package com.example.netty;
import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
/**
 * @author qinxuewu
 * @version 1.00
 * @time 9/10/2018下午 5:37
 */
public class Server {
    public static void main(String[] args) throws Exception {
        //1 创建线两个程组

        //一个是用于处理服务器端接收客户端连接的
        EventLoopGroup pGroup = new NioEventLoopGroup();
        //一个是进行网络通信的（网络读写的）
        EventLoopGroup cGroup = new NioEventLoopGroup();

        //2 创建辅助工具类，用于服务器通道的一系列配置
        ServerBootstrap b = new ServerBootstrap();
        b.group(pGroup, cGroup)		//绑定俩个线程组
                .channel(NioServerSocketChannel.class)		//指定NIO的模式
                .option(ChannelOption.SO_BACKLOG, 1024)		//设置tcp缓冲区
                .option(ChannelOption.SO_SNDBUF, 32*1024)	//设置发送缓冲大小
                .option(ChannelOption.SO_RCVBUF, 32*1024)	//这是接收缓冲大小
                .option(ChannelOption.SO_KEEPALIVE, true)	//保持连接
                .childHandler(new ChannelInitializer<SocketChannel>() {
                    @Override
                    protected void initChannel(SocketChannel sc) throws Exception {
                        //3 在这里配置具体数据接收方法的处理
                        sc.pipeline().addLast(new ServerHandler());
                    }
                });

        //4 进行绑定
        ChannelFuture cf1 = b.bind(8765).sync();
        //5 等待关闭
        cf1.channel().closeFuture().sync();
        pGroup.shutdownGracefully();
        cGroup.shutdownGracefully();
    }
}
